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<p>In present study, nano-sized DyFeO<sub>3</sub> rare-earth orthoferrite was successfully synthesized and characterized for its structural, morphological, and photocatalytic properties. X-ray diffraction (XRD) confirmed a single-phase orthorhombic perovskite structure with high crystallinity and phase purity, further validated by Rietveld refinement. Raman and FTIR spectroscopy supported the structural findings, revealing characteristic vibrational modes and strong bonding interactions within the FeO<sub>6</sub>octahedra. FESEM analysis showed uniformly distributed nanoparticles with minimal aggregation, and BET measurements indicated a high surface area and mesoporous nature. The DyFeO<sub>3</sub>-CNT composites exhibited enhanced photocatalytic activity under visible light, degrading Rhodamine B dye with 79% efficiency in 70 min-significantly higher than the 36% efficiency of pure DyFeO<sub>3</sub>. Kinetic studies revealed improved rate constants due to effective charge separation and higher surface accessibility facilitated by the Carbon nanotubes (CNTs). These results demonstrate that DyFeO<sub>3</sub>-CNT nanocomposites are promising materials for advanced photocatalytic and environmental remediation applications.</p> Graphical Abstract <p></p>

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Enhanced structural and visible-light photocatalytic properties of rare earth orthoferrite DyFeO₃ and DyFeO₃-CNT nanocomposites prepared by sol–gel method

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • V. S. Noorjahan Begum,
  • D. Zarena

摘要

In present study, nano-sized DyFeO3 rare-earth orthoferrite was successfully synthesized and characterized for its structural, morphological, and photocatalytic properties. X-ray diffraction (XRD) confirmed a single-phase orthorhombic perovskite structure with high crystallinity and phase purity, further validated by Rietveld refinement. Raman and FTIR spectroscopy supported the structural findings, revealing characteristic vibrational modes and strong bonding interactions within the FeO6octahedra. FESEM analysis showed uniformly distributed nanoparticles with minimal aggregation, and BET measurements indicated a high surface area and mesoporous nature. The DyFeO3-CNT composites exhibited enhanced photocatalytic activity under visible light, degrading Rhodamine B dye with 79% efficiency in 70 min-significantly higher than the 36% efficiency of pure DyFeO3. Kinetic studies revealed improved rate constants due to effective charge separation and higher surface accessibility facilitated by the Carbon nanotubes (CNTs). These results demonstrate that DyFeO3-CNT nanocomposites are promising materials for advanced photocatalytic and environmental remediation applications.

Graphical Abstract